Fix sub-route shadowing: move /:id after sub-routes, add missing GETs

- pictures.js: move GET/POST/DELETE /:id/words/* BEFORE GET /:id
  so /:id/words is not shadowed; add POST /:id/words/:wordId
- words.js: move GET /:id after sub-routes; add GET /:id/pictures
  and GET /:id/categories
- objects.js: move GET /:id after sub-routes (/:id/words, /:id/pairs,
  /:id/pictures); add GET /:id/pictures

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/routes/objects.js

@@ -55,15 +55,6 @@ router.get('/', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
-// GET /api/objects/:id
-router.get('/:id', async (req, res, next) => {
-  try {
-    const row = await getWithRelations(req.params.id);
-    if (!row) return res.status(404).json({ error: 'Not found' });
-    res.json(row);
-  } catch (err) { next(err); }
-});
-
 // POST /api/objects
 router.post('/', async (req, res, next) => {
   try {
@@ -177,6 +168,29 @@ router.get('/:id/pairs', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
+// GET /api/objects/:id/pictures — full picture objects
+router.get('/:id/pictures', async (req, res, next) => {
+  try {
+    const result = await query(
+      `SELECT p.* FROM pictures p
+       JOIN object_pictures op ON op.picture_id = p.id
+       WHERE op.object_id = $1
+       ORDER BY p.created_at DESC`,
+      [req.params.id]
+    );
+    res.json(result.rows);
+  } catch (err) { next(err); }
+});
+
+// GET /api/objects/:id — AFTER sub-routes to avoid shadowing
+router.get('/:id', async (req, res, next) => {
+  try {
+    const row = await getWithRelations(req.params.id);
+    if (!row) return res.status(404).json({ error: 'Not found' });
+    res.json(row);
+  } catch (err) { next(err); }
+});
+
 // --- Relations ---
 
 // POST   /api/objects/:id/words/:wordId

src/routes/pictures.js

@@ -24,16 +24,7 @@ router.get('/', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
-// GET /api/pictures/:id
+// GET /api/pictures/:id/words — BEFORE /:id to avoid shadowing
-router.get('/:id', async (req, res, next) => {
-  try {
-    const result = await query('SELECT * FROM pictures WHERE id = $1', [req.params.id]);
-    if (!result.rows.length) return res.status(404).json({ error: 'Not found' });
-    res.json(result.rows[0]);
-  } catch (err) { next(err); }
-});
-
-// GET /api/pictures/:id/words — full word objects linked to this picture
 router.get('/:id/words', async (req, res, next) => {
   try {
     const result = await query(
@@ -47,7 +38,18 @@ router.get('/:id/words', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
-// DELETE /api/pictures/:id/words/:wordId
+// POST /api/pictures/:id/words/:wordId — Wort verknüpfen
+router.post('/:id/words/:wordId', async (req, res, next) => {
+  try {
+    await query(
+      `INSERT INTO word_pictures (word_id, picture_id) VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+      [req.params.wordId, req.params.id]
+    );
+    res.status(204).end();
+  } catch (err) { next(err); }
+});
+
+// DELETE /api/pictures/:id/words/:wordId — Wort-Verknüpfung entfernen
 router.delete('/:id/words/:wordId', async (req, res, next) => {
   try {
     await query(
@@ -58,6 +60,15 @@ router.delete('/:id/words/:wordId', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
+// GET /api/pictures/:id
+router.get('/:id', async (req, res, next) => {
+  try {
+    const result = await query('SELECT * FROM pictures WHERE id = $1', [req.params.id]);
+    if (!result.rows.length) return res.status(404).json({ error: 'Not found' });
+    res.json(result.rows[0]);
+  } catch (err) { next(err); }
+});
+
 // POST /api/pictures — neuen Eintrag anlegen
 router.post('/', async (req, res, next) => {
   try {

src/routes/words.js

@@ -37,27 +37,6 @@ router.get('/', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
-// GET /api/words/:id
-router.get('/:id', async (req, res, next) => {
-  try {
-    const result = await query(
-      `SELECT w.*,
-        COALESCE(json_agg(DISTINCT p.id) FILTER (WHERE p.id IS NOT NULL), '[]') AS picture_ids,
-        COALESCE(json_agg(DISTINCT c.id) FILTER (WHERE c.id IS NOT NULL), '[]') AS category_ids
-       FROM words w
-       LEFT JOIN word_pictures wp ON wp.word_id = w.id
-       LEFT JOIN pictures p ON p.id = wp.picture_id
-       LEFT JOIN word_categories wc ON wc.word_id = w.id
-       LEFT JOIN categories c ON c.id = wc.category_id
-       WHERE w.id = $1
-       GROUP BY w.id`,
-      [req.params.id]
-    );
-    if (!result.rows.length) return res.status(404).json({ error: 'Not found' });
-    res.json(result.rows[0]);
-  } catch (err) { next(err); }
-});
-
 // POST /api/words
 router.post('/', async (req, res, next) => {
   try {
@@ -109,6 +88,55 @@ router.delete('/:id', async (req, res, next) => {
   } catch (err) { next(err); }
 });
 
+// GET /api/words/:id — AFTER sub-routes to avoid shadowing
+router.get('/:id', async (req, res, next) => {
+  try {
+    const result = await query(
+      `SELECT w.*,
+        COALESCE(json_agg(DISTINCT p.id) FILTER (WHERE p.id IS NOT NULL), '[]') AS picture_ids,
+        COALESCE(json_agg(DISTINCT c.id) FILTER (WHERE c.id IS NOT NULL), '[]') AS category_ids
+       FROM words w
+       LEFT JOIN word_pictures wp ON wp.word_id = w.id
+       LEFT JOIN pictures p ON p.id = wp.picture_id
+       LEFT JOIN word_categories wc ON wc.word_id = w.id
+       LEFT JOIN categories c ON c.id = wc.category_id
+       WHERE w.id = $1
+       GROUP BY w.id`,
+      [req.params.id]
+    );
+    if (!result.rows.length) return res.status(404).json({ error: 'Not found' });
+    res.json(result.rows[0]);
+  } catch (err) { next(err); }
+});
+
+// GET /api/words/:id/pictures — verknüpfte Bilder laden
+router.get('/:id/pictures', async (req, res, next) => {
+  try {
+    const result = await query(
+      `SELECT p.* FROM pictures p
+       JOIN word_pictures wp ON wp.picture_id = p.id
+       WHERE wp.word_id = $1
+       ORDER BY p.created_at DESC`,
+      [req.params.id]
+    );
+    res.json(result.rows);
+  } catch (err) { next(err); }
+});
+
+// GET /api/words/:id/categories — verknüpfte Kategorien laden
+router.get('/:id/categories', async (req, res, next) => {
+  try {
+    const result = await query(
+      `SELECT c.* FROM categories c
+       JOIN word_categories wc ON wc.category_id = c.id
+       WHERE wc.word_id = $1
+       ORDER BY c.name_de`,
+      [req.params.id]
+    );
+    res.json(result.rows);
+  } catch (err) { next(err); }
+});
+
 // POST /api/words/:id/pictures/:pictureId — Bild verknüpfen
 router.post('/:id/pictures/:pictureId', async (req, res, next) => {
   try {